Textile spindle mounting

ABSTRACT

A textile spindle assembly is mounted on a machine rail by means of two correlative supporting plates separated by elastic members with the result that audible frequency vibrations are reduced during operation thereof.

I United States Patent 1151 3,673,783 Timbie 1 July 4, 1972 54 TEXTILE SPINDLE MOUNTING 2,650,465 9/1953 Westall ..57/135 2,668,087 2/1954 Soussloff et al ..308/l52 [72] Imam" Pensmla 2,787,114 4/1957 Jenkins ..57/130 [73] Assignee: Monsanto Company, St. Louis, Mo. 2,803,106 8/1957 Lindemann et 211.. .....57/88 3,049,860 8/1962 Beerli ...57/l35 [22] 1971 3,063,230 11/1962 Tetreault ..57/88 [21] Appl.No.: 122,711

Primary Examiner- John Petrakes 52 u.s.c1 .57 135 57/88 57/130 A'w'ner-stanley-M'Tam",Kelly QCmleyWealWillisand 30 52 Elmer J. FlSChCl [51] lnt. Cl. ..D01h 7/08 [58] Field ofSearch ..57/l29l35,88; ABSTRACT 308/149 152 A textile spindle assembly is mounted on a machine rail by means of two correlative supporting plates separated by References Cited elastic members with the result that audible frequency vibra- UNITED STATES PATENTS tions are reduced during operation thereof. 2,479,168 8/1949 Keene et al ..57/ 130 4 Claims, 3 Drawing Figures PATENTEDJUL "4 m2 SHEET 10F 2 FIG. 2.

FIG. I.

INVENTOR. ROBERT W. TIMBIE ATTORNEY PATENTEDJUL 4 1972 SHEET 2 Bf 2 INVENTOR. ROBERT w. TIMBIE- ATTORNEY TEXTILE SPINDLE MOUNTING BACKGROUND OF THE INVENTION The present invention relates to a structure for mounting a spindle-bearing housing on a spindle rail of textile machines, wherein the spindle blade with a driving whorl is rotatably carried in the housing. The mounting is especially applicable for use on draw twisting equipment employed to process manmade continuous filaments and the like.

Textile spinning spindles are secured to the framework of textile processing machines by various types of mountings. Such mountings are either elastic or rigid. Present rigid mountings cause sound levels above that recommended for human hearing conservation. At higher rotative speeds it has been found that a non-rigid or elastic mounting provides certain advantages such as reducing vibrations caused by an out of balance load during critical speed phases but does not reduce noise to a satisfactory level. Furthermore, these known elastic mountings are not entirely satisfactory when a relatively large package of yarn is taken up at high speeds of 10,000 to 20,000 rpm. Through the use of the device described below an elastic mounting of a spindle-bearing housing to a spindle rail permits the spindle to be turned at high speeds while a large package of yarn is built. The noise produced while using the new device is significantly reduced. Also, maintenance of the device is not an expensive consideration. Furthermore, existing equipment having rigid mounts can easily be converted to non-rigid mounts in an inexpensive manner by incorporating the inventive features of the present device.

SUMMARY OF THE INVENTION In accordance with the present invention a textile machine, especially a draw twister, is provided with special mountings for spindle-bearing housings with the result that audible frequency vibrations are reduced. The machine has a spindle rail or frame with at least one opening passing therethrough. Through the opening a spindle-bearing housing extends vertically. Ordinarily, the housing has an upper bearing and a foot bearing for joumaling a spindle blade therein. A driven whorl is part of the blade; and together they support a tube on which twisted yarn is wound. A first support plate is fixedly carried on the upper portion of the housing. Preferably, the support plate has at least three selectively spaced openings therethrough. There is provided a second supporting plate complimentary with respect to the first plate. The second plate is spaced just below the first by means of elastic members compressed therebetween. These members preferably are elastic washers located in each of the openings in the first plate. The two plates are secured together preferably by bolt members extending through the washer members. A tubular extension is provided on the second plate extending vertically downward through the rail opening and is spaced from the rail. Means co-act with the tubular extension to secure the second plate to the rail.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawing:

FIG. 1 is a partially sectioned elevation of a conventional rigid mounting of a spindle-bearing housing to a machine rail or frame, with the structure of the bearing being shown in detail;

FIG. 2 is a partially sectioned elevation of the non-rigid mounting of a spindle-bearing housing to a machine rail in accordance with the present invention; and

FIG. 3 is an exploded perspective view of the mounting assembly of the present invention, the rail and spindle blade not being shown in order to illustrate the assembly in a better fashion.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference now to the drawing in greater detail, it will be noted in FIG. 1 that numeral 1 denotes a spindle rail or bolster rail as a part of a machine frame of a textile machine for twisting and collecting yarn-in the form of a package. A spindle-bearing housing or bolster 2 is mounted on the rail and extends through an opening 3 in the rail. It is understood that the rail is provided with a plurality of identical holes along the length of the machine and quite commonly on the backside of the machine to provide a like number of spindle positions. Only one position is illustrated for convenience.

The spindle-bearing housing comprises a tubular casing 5 having an external thread 6 on the upper portion thereof that extends through the opening. The housing is secured to the rail by means of nuts 7 and flange 8 and washer 10. This is, of course, a rigid mount.

A spindle blade 11 is journaled in the spindle-bearing housing by means of an upper roller bearing 12 providing transverse support and a foot bearing 13 providing vertical support.

To permit dynamic centering of the combined mass of the spindle, together with the mass of the tube and the yarn wrapped thereon, a spirally slotted tubular spring 15 and oil filled coil 16 form part of the bolster.

A whorl or wharve 17 receives internally the upper end of the bolster in order to bring the bobbin base 18 and upper bearing 12 as close together as practicable. This base supports a. bobbin (not shown) or other tube-like member on which yarn is wound and carries a drive lug 19 which engages in a corresponding member in the bottom of the pim. A belt (not shown) rotatably drives the whorl at selected speeds. When the structure of FIG. 1 is driven at high rotary speeds vibrational and resulting noise problems often ensue. In practice these problems are aggravated because adjacent spindles will resonate. Workers in such machine areas are thereby subjected to a health hazard that should be avoided.

In FIG. 2 a similar spindle-bearing housing 2 is shown mounted with clearance in a hole in spindle rail 1. A spindle blade 11 having a belt driven wharve 17 is journaled in a similar manner in the housing. An upper support plate'20 having a generally triangular shape is fixedly mounted to the upper portion of bolster 2. Conveniently'the plate has a central threaded opening that receives the threaded portion of the bolster. At each comer of the plate a hole 21 (See FIG. 3) is provided. It is understood that the plate can have any other desired shape and can have three, four or more holes.

A second plate 22 correspondingly shaped with respect to plate 20 has a central opening 23 for receiving the upper end of the bearing housing with clearance. A tubular extension 25 on the second plate having an exterior thread extends through the rail opening 3 with clearance.

Elastic ring members or grommets 26 are placed in each of the holes 21. Preferably these ring members are double flanged to fit snugly in the holes. For convenience of installation the rings are centrally severed as shown in FIG. 3. The rings are made of suitable elastomers. The elastomer preferably is electrically .conductive in order that static charges of electricity generated by the drawing of the spindles and the winding of the yarn are dissipated through the machine to a ground.

As illustrated, through each elastic ring a bolt member 27 is placed to secure the upper support plate 20 to the second plate 22 and engages a nut 28. A sleeve 29 extends through the grommet and surrounds member 27. By means of nut 7 the assembly of the upper plate and second plate is secured to the spindle rail.

A braking device 30 for decelerating the spindle blade is also illustrated in FIGS. 2 and 3. The second plate 22 has a downwardly bent section 31 on which the device is secured by means of spacers 32, bolts 33 and nuts 34. The braking device comprises an elongated lever plate 36. When the bottom part of the plate is pushed toward the spindle-bearing housing, rubber mount 35 flexes; and the braking surface 37 engages the outer surface of whorl 17. Dofi'er guard 38 prevents removal of the blade while doffing of the bobbins are accomplished. To remove the blade, lever plate 36 is pulled away providing clearance for the whorl to pass the dofler guard.

It is known that elastomers are used to isolate and damp vibration to inhibit transmission of vibration from a vibrating element to a fixed element. Transmissibility increases as the ratio of disturbing frequency (spindle speed in the present instance) to the natural frequency of the elastomer isolation approaches unity and then decreases until the ratio is about 1.414 where it has no effect, then further increases of this ratio rapidly decreases the transmissibility.

The configuration of the present device permits ease of selection of proper elastomer material and configuration to reduce transmissibility to a minimum and still obtain stable performance of the rotating unbalanced spindle. The bottom half grommet is the vibration isolator, and the top half grommet controls rebound and acts as dampers. Elastomer hardness, areas and preloading are selected to obtain the required natural frequency.

It is also known that resonance magnifies the amplitude of vibrations in a relatively undamped system, often to a destructive value. With a multiplicity of spindles on a twisting frame,

' this device eliminates resonance between neighboring spindles thereby considerably reducing the over all sound level.

I claim: I. A textile machine having reduced audible frequency vibrations'comprising in combination:

a. a spindle rail formed with at least one opening passing therethrough; b. a spindle-bearing housing extending through said openmg; c. a first support plate fixedly carried on the said housing; d. a second complementary supporting plate having an opening through which the said housing passes, in spaced relation;

e. elastic members located between the first andsecond supporting plates to space one plate from the other;

f. means securing together the first and second supporting plates;

g. a tubular extension on said second supporting plate portion extending through the rail opening and space therefrom;

h. fixing means coacting with the tubular extension to secure the second plate to said rail;

i. a spindle blade supported in said bearing housing; and

j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound.

2. The machine of claim 1 in which the elastic ring members are electrically conductive.

3. In a. textile draw twister machine having reduced audible frequency vibrations, a spindle mounting comprising in combination:

a. a spindle rail formed with at least one opening passing therethrough;

b. a spindle-bearing housing extending vertically through said opening;

c. a first support plate fixedly carried on the said housing and having at least three openings passing therethrough;

d. a second complementary supporting plate having an opening through which the said housing passes in spaced relation;

e. a flanged electrically. conductive elastic ring member located in the said openings in the first supporting plate to non-rigidly space the second plate below the first plate;

f. bolt members in said ring members securing together the first and second supporting plates;

g. a tubular extension on said second supporting plate extending through the rail opening and spaced therefrom;

h. fixing means coacting with the tubular extension to secure the second plate to the rail;

i. a spindle blade supported in said bearing housing; and

j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound. 4. In a textile draw twister machine having reduced audible frequency vibrations, a spindle mounting comprising in combination:

a. a spindle rail formed with at least one opening passing therethrough;

b. a spindle-bearing housing having an upper bearing and foot bearing therein, having an exterior thread on the upper portion thereof and extending vertically through said opening;

c. a first support plate fixedly carried on the upper threaded portion of said housing and having at least three openings passing therethrough;

d. a second complementary supporting plate having an opening through which the said housing passes in spaced relation;

e. a double flanged electrically conductive ring member located in each of said openings in the first supporting plate to non-rigidly space the second plate below the first plate;

f. bolt members in said ring members securing together the first and second supporting plates;

g. a tubular extension on said second supporting plate hav' ing an exterior thread extending through the rail opening and spaced therefrom;

h. an internally thread member coacting with the tubular extension to secure the second plate to the rail;

i. a spindle blade rotatably supported in said bearing housing; and

j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound. 

1. A textile machine having reduced audible frequency vibrations comprising in combination: a. a spindle rail formed with at least one opening passing therethrough; b. a spindle-bearing housing extending through said opening; c. a first support plate fixedly carried on the said housing; d. a second complementary supporting plate having an opening through which the said housing passes in spaced relation; e. elastic members located between the first and second supporting plates to space one plate from the other; f. means securing together the first and second supporting plates; g. a tubular extension on said second supporting plate portion extending through the rail opening and space therefrom; h. fixing means coacting with the tubular extension to secure the second plate to said rail; i. a spindle blade supported in said bearing housing; and j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound.
 2. The machine of claim 1 in which the elastic ring members are electrically conductive.
 3. In a textile draw twister machine having reduced audible frequency vibrations, a spindle mounting comprising in combination: a. a spindle rail formed with at least one opening passing therethrough; b. a spindle-bearing housing extending vertically through said opening; c. a first support plate fixedly carried on the said housing and having at least three openings passing therethrough; d. a second complementary supporting plate having an opening through which the said housing passes in spaced relation; e. a flanged electrically conductive elastic ring member located in the said openings in the first supporting plate to non-rigidly space the second plate below the first plate; f. bolt members in said ring members Securing together the first and second supporting plates; g. a tubular extension on said second supporting plate extending through the rail opening and spaced therefrom; h. fixing means coacting with the tubular extension to secure the second plate to the rail; i. a spindle blade supported in said bearing housing; and j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound.
 4. In a textile draw twister machine having reduced audible frequency vibrations, a spindle mounting comprising in combination: a. a spindle rail formed with at least one opening passing therethrough; b. a spindle-bearing housing having an upper bearing and foot bearing therein, having an exterior thread on the upper portion thereof and extending vertically through said opening; c. a first support plate fixedly carried on the upper threaded portion of said housing and having at least three openings passing therethrough; d. a second complementary supporting plate having an opening through which the said housing passes in spaced relation; e. a double flanged electrically conductive ring member located in each of said openings in the first supporting plate to non-rigidly space the second plate below the first plate; f. bolt members in said ring members securing together the first and second supporting plates; g. a tubular extension on said second supporting plate having an exterior thread extending through the rail opening and spaced therefrom; h. an internally thread member coacting with the tubular extension to secure the second plate to the rail; i. a spindle blade rotatably supported in said bearing housing; and j. a driven whorl attached to said blade for supporting and turning a tube on which yarn is wound. 